QSS and QWebView

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It is possible to customize the elements in the WebView using QSS?

I'm trying to modify the style of the QComboBox is that the QWebView, but has no effect.

I could only change the selector QAbstractItemView{}.

I tried the following but did not work:
@ QComboBox { ... }
QComboBox::item { ... }

QListView { ... }
QListView::item { ... }

QAbstractItemView { ... }
QAbstractItemView::item { ... }

QAbstractScrollArea { ... }
QAbstractScrollArea::item { ... }

QComboBox::drop-down { ... }

QComboBox::drop-down:button { ... }@